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Spray tower limestone - gypsum wet FGD is one of the main equipment for spray tower structure optimization study has been the subject of interest of researchers. This establishment is equipped with 148mm diameter perforated sieve spray tower bench, and carried out related research. Loaded porous plate, spray tower and tower-liquid two-phase field-contact manner completely changed, it is necessary to sieve gas-liquid flow characteristics. Using air. Water as a medium, the pore size of 6 ~ 30mm, opening ratio range of 16 to 48% of the gas-liquid two-phase flow contact state sieve tested, examined in detail the air pressure drop of the wet pressure drop of, holding liquid and foam layer height with superficial velocity, spray volume, pore size sieve, sieve opening rate, sieve installation location, thickness of the sieve, and analyzed with different pore sizes, opening rate of the bubble point and liquid Pan-emergence of the law. In the experimental stage sieve-type spray tower desulfurization performance tests conducted to discuss the current situation and the liquid on the sieve sieve design parameters (such as aperture sieve, sieve opening rate, sieve installation location, sieve plate thickness, etc. ) on the desulfurization efficiency. It was found that the level of efficiency desulfurization rate and sieve liquid two-phase flow conditions are closely related. Only in gas-liquid two-phase gas-liquid contact in the turbulence intensity greater good vibration state or relatively thick foam uniform bubbling area, in order to ensure SO 2 fully absorbed; when appearing on the sieve storey through the small bubble, or no foam layer on the sieve, or tower flue gas velocity is too large, the flooding situation occurs, the uniformity of the foam layer tower severely damaged, in both cases, the desulfurization effect relatively poor. By experimental study, found that when the fixing hole was 36%, the pore diameter of 12mm sieve has the highest removal efficiency; when the fixed diameter is 15mm, the openings of the sieve was 36% with the highest desulfurization efficiency. Sieve through the sprinkler spray tower and the tower without sieve In contrast, in the case of good working condition sieve, the sieve tower sprinkler spray tower than those without higher efficiency sieve 2 to 6% (absolute value). High speed under the same conditions, even higher than 15%. Equipped with double-layer porous sieve experimental stage spray tower using NaClO 2 as an additive, CaCO 3 slurry as absorption liquid for a synergistic desulfurization and denitrification experiments discussed the slurry pH, inlet NO, SO 2 concentration, L / G as well as the amount of additives for NO, SO 2 removal efficiency. By comparing the experimental findings, a separate denitrification experiment, denitrification efficiency of only 6%; collaborative experiments desulfurization and denitrification and desulfurization efficiency of denitrification rates were 100% and 97.5 ~ 40.8 ~ 60.5%.
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